add much better tests for python version information parsing

Lib/platform.py

@@ -1264,9 +1264,6 @@ _sys_version_parser = re.compile(
     '\(#?([^,]+),\s*([\w ]+),\s*([\w :]+)\)\s*'
     '\[([^\]]+)\]?')
 
-_jython_sys_version_parser = re.compile(
-    r'([\d\.]+)')
-
 _ironpython_sys_version_parser = re.compile(
     r'IronPython\s*'
     '([\d\.]+)'
@@ -1322,12 +1319,12 @@ def _sys_version(sys_version=None):
     elif sys.platform[:4] == 'java':
         # Jython
         name = 'Jython'
-        match = _jython_sys_version_parser.match(sys_version)
+        match = _sys_version_parser.match(sys_version)
         if match is None:
             raise ValueError(
                 'failed to parse Jython sys.version: %s' %
                 repr(sys_version))
-        version, = match.groups()
+        version, buildno, builddate, buildtime, _ = match.groups()
         branch = ''
         revision = ''
         compiler = sys.platform

Lib/test/test_platform.py

@@ -48,25 +48,52 @@ class PlatformTest(unittest.TestCase):
     def test_processor(self):
         res = platform.processor()
 
-    def test_python_implementation(self):
-        res = platform.python_implementation()
-
-    def test_python_version(self):
-        res1 = platform.python_version()
-        res2 = platform.python_version_tuple()
-        self.assertEqual(res1, ".".join(res2))
-
-    def test_python_branch(self):
-        res = platform.python_branch()
-
-    def test_python_revision(self):
-        res = platform.python_revision()
-
-    def test_python_build(self):
-        res = platform.python_build()
-
-    def test_python_compiler(self):
-        res = platform.python_compiler()
+    def setUp(self):
+        self.save_version = sys.version
+        self.save_subversion = sys.subversion
+        self.save_platform = sys.platform
+
+    def tearDown(self):
+        sys.version = self.save_version
+        sys.subversion = self.save_subversion
+        sys.platform = self.save_platform
+
+    def test_python_info(self):
+        # Tests for python_implementation(), python_version(), python_branch(),
+        # python_revision(), python_build(), and python_compiler().
+        sys_versions = {
+            ("2.6.1 (r261:67515, Dec  6 2008, 15:26:00) \n[GCC 4.0.1 (Apple Computer, Inc. build 5370)]",
+             ('CPython', 'tags/r261', '67515'), self.save_platform)
+            :
+                ("CPython", "2.6.1", "tags/r261", "67515",
+                 ('r261:67515', 'Dec  6 2008 15:26:00'),
+                 'GCC 4.0.1 (Apple Computer, Inc. build 5370)'),
+            ("IronPython 2.0 (2.0.0.0) on .NET 2.0.50727.3053", None, "cli")
+            :
+                ("IronPython", "2.0.0", "", "", ("", ""),
+                 ".NET 2.0.50727.3053"),
+            ("2.5 (trunk:6107, Mar 26 2009, 13:02:18) \n[Java HotSpot(TM) Client VM (\"Apple Computer, Inc.\")]",
+             None, "java1.5.0_16")
+            :
+                ("Jython", "2.5.0", "", "", ("", ""),
+                 "java1.5.0_16"),
+            }
+        for (version_tag, subversion, sys_platform), info in \
+                sys_versions.iteritems():
+            sys.version = version_tag
+            if subversion is None:
+                if hasattr(sys, "subversion"):
+                    del sys.subversion
+            else:
+                sys.subversion = subversion
+            if sys_platform is not None:
+                sys.platform = sys_platform
+            self.assertEqual(platform.python_implementation(), info[0])
+            self.assertEqual(platform.python_version(), info[1])
+            self.assertEqual(platform.python_branch(), info[2])
+            self.assertEqual(platform.python_revision(), info[3])
+            self.assertEqual(platform.python_build(), info[4])
+            self.assertEqual(platform.python_compiler(), info[5])
 
     def test_system_alias(self):
         res = platform.system_alias(